The women 's Patagonia Capilene 4 Expedition 1/4 Zip Hoody is the warmest and most breathable baselayer in the Capilene® family, whether you’re working under a full head of steam or settling in for an open-air bivy. It has a soft, stretchy feel, with a smooth jersey face that glides beneath layers and a brushed fleece interior to warm your core, wick moisture and rest smoothly against the skin. Hidden thumb loops ensure wrist coverage when you’re climbing and an anatomically-shaped hood with a tall collar blocks the wind and increases coverage and warmth. An elongated front zipper quickly vents heat, a chest pocket stows your energy bar and the baseball-style hem stays put under a harness. Made of 5.9-oz proprietary performance Polartec® Power Dry® High Efficiency™ fabric that has Gladiodor® odor control for the garment.